(BRIGHT-CHEEKED GREBE.)
+Podiceps caliparæus+, _Darwin, Zool. Voy. 'Beagle,'_ iii. p. 136;
_Scl. et Salv. Nomencl._ p. 150; _iid. Ex. Orn._ p. 190; _Durnford,
Ibis_, 1877, p. 45 (Chupat), et 1878, p. 405 (Centr. Patagonia);
_White, P. Z. S._ 1883, p. 43 (Cordova).
_Description._--Above dark greyish; front of head and neck behind
pale cinereous; back of head and upper part of neck black;
ear-coverts considerably elongated, golden brown: beneath, throat
grey, paler than front of head; rest of under surface shining
white; primaries greyish brown, the innermost tipped with white;
secondaries more or less pure white, or dusky on outer webs: whole
length 11·5 inches, wing 4·7. _Female_ similar.
_Hab._ Antarctic America, north to Cordova.
Darwin obtained examples of this beautiful Grebe at Bahia Blanca, where,
he says, "it lives in small flocks in the salt-water channels extending
between the great marshes at the head of the harbour." Durnford procured
specimens on both visits to Chupat, where he found it common in the
lagoons in all the valleys. It is also found, though not so abundantly,
in the northern provinces of the Argentine Republic. White obtained a
single example at Cosquin, near Cordova, in September 1882.